Refrigerating apparatus



Sept. 12,1933. Q. F. KUHLS 1,926,810

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Pat nted Se t. 12, 1933 v 1,926,810

UNITEDFISTATES PATENT OFFICE 1,9gas1o I aamrenaarmc APPARATUS -Oarl F. Kuhn, Dayton, Ohio, 'assignor to Frigidaire Corporation, Dayton, Ohio, a corporation of Delaware Application January so, 1929. Serial Nassau;

' 6 Claims. (01. zzo -s) This invention relates to refrigerating appa- 25, a back panel 26, and a top 27.] If desired, .ratus and more particularly to a cabinet adapted the cabinet may be provided with a ,machine to receive a mechanical refrigerating system compartment 28 formed, if desired; below the or a part thereof, and also to the method of food compartment 20. The cabinet may conmanufacturing the cabinet. tain the cooling element 29 of a refrigerating 60 An object of this invention is to provide a system, and in this particular embodiment it may cabinet which may be manufactured by a relacomprise an evaporator of 'a system made in actively simple method of, manufacture, which is cordance with the disclosureinthe patent to-R. G. relatively rigid, and which is made of relatively Osborn, No. 1,556,708, patented October 13, 1925,

few parts. or in the French patent to Security Trust Com- 65 Another object of this invention'is to provide puny. 4 ,9 1 ,P h December 29,,1922- a method of manufacturing a refrigerator cabdesired, the machinery of the refrigerating sysinet, which method includes relatively simple tem may be placed in the cabinet 28, and if the operations, and which are adapted to quantity cooling of the parts is to be accomplished by the production. I circulation of air, suitable openings, such as an Further objects and advantages of the presopening in the back 30, and if necessary, louvers ent invention will be apparent from the follow- 31, for instance in the front, may be provided. ing description, reference being had to the ac- Inside of the compartment suitable shelves 32- companying drawings, wherein a preferred form may be provided. If desired, a cooling unit 20 of the present invention is clearly shown. shield 33 provided with a drip shelf 34 and a drain In the drawings: pipe 35 may also be provided.

Fig. 1 is a view in perspective of a cabinet In the manufacture of, this cabinet, the food embodying features of this invention; compartment 20 may be a sheet metal box-like Fig. 2 is a vertical cross sectional view, partly compartment having at least its inner surface 35 in elevation, of the cabinet shown in Fig. 1; properly coated, such as by porcelain enamel. "Fig. 3' is a vertical cross sectional view taken The insulation 23 may be secured to the outer transversely to Fig. 2; surface of -the lining 20, and, in the preferred Fig. 4 is a horizontal cross sectional view of, embodiment, the insulation may be attached by a cabinet embodying features of this invention;v coating either the outer surface of the lining 20 Fig. 5 isa horizontal view, on an enlarged or the inner surface of the insulation with a scale, of a portion of Fig. 4; bituminous cement such as hydrolene and by ap- Fig. 6 is a cross sectional view of an element plying the insulation to' the lining while the used in the construction of the cabinet, taken cement is still in a molten condition. If desired,

' along the line 6--6 of Fig. 7; both the lining and insulation, which may be Fig. 'l is a view partly in section and partly in corkboard or rock cork may be covered with the T vati n of th devi shown in F 6; I bituminous cement. In addition, the door jamb Fig. 8 is a horizontal cross sectional view, on 22, which may be of any suitable non-conducting an enlarged scale, ofa corner of the cabinet substance such as wood, may be secured'to the shown in Fig. 4,'and taken on a plane near the door opening 21, preferably on the, outside of 0 bottom thereof; the'door opening.

Fi 9 is a side elevation of Fig. 8: The outer surface of the insulation 23 may be Fig. 10 is a top plan view of a slightly modified made tight. For instance, it may have a cabinet with the top removed; coat applied to it of'the bituminous cement here- 5 Fig. 11 is aview similar to Fig. 10 of a slightly tofore described, in such a manner that the outer modified form; surface of the insulation is rendered substantial- Fig. 12 is an enlarged cross sectional view of a 1y air tight. The front paneling 24, which in corn r 1' th cabine Sh wn in i 10. this particular embodiment may be a single panel Fig. 13 is an-elilarged comer view of the cabinet having a suitable door opening corresponding shown in Fig. 11, and i to the opening 21 and an additional opening 40 1 n Fig. 14 is an enlarged cross sectional view of a for the machinery compartment 28, may be portion of Fig. 3. a i secured to the door jamb 22. The side edges of A cabinet embodying features of this inventhe front paneling 24 may be provided with means tion may comprise, in general, a food compartfor locking the, edges to the edges of the side ment 20 having a door opening 21, a doorjamb panels 25. The other edges of the side panels 25 22, insulation 23, front paneling 24, side panels may be provided with means for locking with the placing it under the flange 51 and the flange 52.

'final backwardly directed flange 43. The side panel 25 may be inwardly bent as at 44, then backwardly bent as at and finally provided with a curl 46 adapted tr flt around the flange 43. A spacer 47 may be provided in order to prevent damage to the finishing surface of the panels caused by relative movement of The locking means at the front of the cabinet ma? be similar to'the locking means at the rear of the cabinet. By the construction shown it is possible after the front paneling 24 has been secured to the door jamb 22 to place the rear panel 26 approximately in place and to secure the pmel 50 (Fig. 3) underneath the food compartment by The construction of the locking means is such that the side panels 25 may be forced past the locking flanges of the paneling 24 and the paneling 26 by movement of the side panels 25 of the cabinet towards the center. Afterwards the spacing means 4'7 may be slid in place either from the top or from the bottom of the cabinet, or it may be forced laterally inwardly in the same manner as the panels 25. When all of these members are in position, the rods 53 maybe slid either from the top or from the bottom of the cabinet between the flange 43 and the curled portion .46 in such a manner that the paneling is rendered into a. rigid structure due to the wedging and locking action of the rod 53.

The spacing member 47 may be provided with a head 54 and a flange55 in order to prevent the same from-disengaging after it has been asembled. This member maybe provided with a rubber coating 56 which may be vulcanized on to the member preferably by providing openings 5'! and 58 so that the rubber may flow through the member and adhere to the rubber-on the opposite sides of the'member. The rods 54 m also have a rubber 59 placed around themas by also vulcanizing it thereon. Before the rods 54 are inserted in place, the rubber 59 may be moistened withwatersoastoinsureaneasyslidingaction of the rods when the moisture evaporates from the rods, the rods become relatively tly set in place by the friction of the rubber and there is no tendency for the rods to slide onto! the cabinet.

Various other desirable features may be provided for the cabinet. Thusthe door opening may be provided with finishing stripsdo and with a door '61 hinged to the cabinet inanysuitablemanner preferably by hinges 61a secured to thedoors 61 and to the door jamb 22. The bottom of the panels may be provided with caster-like construction. For this purposethe panels may be provided with substantiallyhorizontal flangu to which a glider receiving plate 71 may be secured as by means of bolts '72. The glider receiving plate may be provided with a suitable 3- legged caster orglider receiving member '13 adapted to receive a glider 74. If n, a strengthening groove '75 may be formed in the plate '71. V The flanges '10 may, if desired,beextended substantially throughout the length of the panels so that horizontal bars 76 may be secured to the flanges 70 and on these bars the refrigerating machinery may be mounted. Bolts posing throughtheflanges70andbars76maybeused 'serted after the panels are in place by forming cabinet, due to the locking construction 94. The

tosecurethebars'lfiinplace. Adoo'r'l'lmaybe hingedtotheopeningmsothataccessmaybe had to the machinery compartment from the front of the cabinet.

In the embodiment shown in Figs. 10 and 12 the front panel 80 may be formed with a backwardly directed portion 81 and an inwardly directed flange 82. The side panels 83 may be provided with aninwardly directed flange 84 and a forwardly directed circular extension 85. The rear corners of the cabinet may be provided with similar construction. In this modification the side panels 83'may be slid either from the top or from the bottom of the cabinet with the locking means.81 to 85 inclusive in engagement. The rearpanel 86 mayalsobeslidfromthetop. If desired, side panels 83 and rear panel 86 may be provided with flanges at the top indicated at 87. In this case the top insulation 88 may be intwo large slabs of insulation and one small slab 89 which may be inserted after thelarge slabs have been forcedlaterally outward under the flanges of the panels.

In the modification shown in Figs. 11 and 13, the front paneling 90 and the side panels 91 may be formed of a single integral sheet being bent at the corners 92. The rear panel 93 may then he slid either from the top or the bottom of the locking construction 94 may be formed by bending the edges ofthe sides 91 inwardly as at 95 and providing a small flange 96. The edges of theback panel93maybebentforwardlyasat' 97, then outwardly as at 98 and thence baehwardly and inwardly as at 99. Thus a locking construction is provided for the rear panel and for the edges of the combined front end panel member. In this construction the top insulation may be assembled after. the paneling has been placed on the cabinet as described in Figs. 10 and 12 or the insulation may be applied to the food com- 'partmentlininginthesamemanneras relativeto Figs. 4 to 9 inclusive. In this latter case either the top edges or the bottom edges of the panels should not beprovided with flanges sothatthepanelingmaybeslideitherfromthe top or from'the bottom over the insulation. However, the sides 91 maybeprovided with both ton andbottomilangessincetbispanelingmaybew placedonthecabinetinasortofalaterallybackward movement and thereafter the rear panel 93maybeslideitherfromthetoporthebottom ofthecabinet.

The application of the bituminous eemcnt. 131 suchashyrholeneissubstantiallythesamein all m It has been illustratedinrlg.l2,wherethehydroleneorcemmt isas100.However,itistobeunderstoodthatthieh'ydroleneor eementmsybeap- 131 pliedinallmodiflcations. I

Whiletheformoftoftbeinvmtion as herein disclosed a preferred form, itistobeimderstoodthatother forms mightbeadoptedallcoming'withinth'eseopeu of the claimswhich follow.

Whatisclaimedisasfollows:

1. Arefrigerator cabinetabox-like, sheet metal, food compartment lining having a door opening, insulation on the outside of said 14 lining," a relatively non-conducting door jamb secured around said door opening, frontpaneling secured to said door jamb, side panels in interlocking relation with saidfrontpanelingm. back panelinterlocking with said sidepanels, wi

spacing members between said side panels and said back panel.

2. A refrigerator cabinet comprising a box-like, sheet metal, food compartment lining having a door opening, insulation'onthe outside of said lining, a relatively non-conducting door jamb secured around said door opening, front paneling secured to said door jamb, side panels in interlocking relation with said front paneling, a back panel interlocking with said side panels, spacing members between said front paneling and said side panels and between said side panels and said rear panel.

3. A refrigerator cabinet comprising a box-like sheet metal food compartment lining having a door opening, walls of insulating material surrounding said lining, said walls having notches at the corners, metal panels covering said walls of insulating material, said panels being connected together by inwardly turned interlocking joints at the corners of said cabinet, said interlocking joints being located within said notches behind the corners of said panels.

4. A refrigerator cabinet comprising a box-like sheet metal food compartment lining having a door opening, walls of insulating material surrounding said lining, said walls having notches at the corners, metal panels covering said walls of insulating material, said panels being connected together by inwardly turned interlocking joints at the corners of said' cabinet, said interlocking Joints being curled inwardly into said notches and engaging the comers of said panels supporting and reinforcing said. corners.

5. A refrigerator cabinet comprising a box-like 80 sheet metal food compartment lining, walls of insulating' material surrounding said lining, sheet metal panels abutting and forming a covering f said walls of insulating material, said sheet me al panels being connected together by inwarly g5 turned interlocking joints which are curled within the confines of the panels to form integral tubular structures at the corners of the cabinet for forming frame-like members for the cabinet and for reinforcing the edges of the panels and the corners of the cabinet.

'6. A refrigerator cabinet comprising a box-like sheet metal food compartment lining, insulating means surrounding the lining, sheet metal panels surrounding and forming a covering for the insulating means, at least some of said sheet metal panels being connected together by inwardly turned interlocking joints which are curled within the confines of the cabinet to form integral tubular structures at least at some of the corners of the cabinet for forming frame-like members for the cabinet and for reinforcing some of the edges of the panels and at least some of the corners of the cabinet.

CARL F. KUHIS. a

its 

